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<h1>EJB + JPA + JSF + JAX-RS
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</h1>
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<p><a name="EJB+JPA+JSF+JAX-RS-BusinessCase"></a></p>
<h1>Business Case</h1>
<p>The example explains how a real-life business problem is solved using
OpenEJB in a combination with other open-source frameworks and tools. The
example covers the entire technical solution, including architecture,
design, build automation, unit testing, implementation, and deployment.</p>
<p>The product is hosted at <a href="http://oss.rempl.com">http://oss.rempl.com</a>
with its source code available at [http://svn.rempl.com/trunk/rempl/rempl-oss]
. The purpose of the system is to collect UML meta information from open
source products and make it visible for end-users in form of diagrams and
texts. More information about the product and its documentation you can get
at [http://www.rempl.com/rempl-oss/]
.</p>
<p><a name="EJB+JPA+JSF+JAX-RS-ArchitectureandDesign"></a></p>
<h1>Architecture and Design</h1>
<p>The following Java-stack technologies are used in the system:</p>
<ul>
<li>OpenEJB as an implementation of EJB</li>
<li>OpenJPA, an implementation of JPA</li>
<li>Jersey, implementation of JAX-RS</li>
<li>Mojarra, implementation of Java Server Faces (JSF)</li>
</ul>
<p>There are three layers in the system (Presentation, Business, and
Persistence) and a number of components in each of them: </p>
<p>!http://www.rempl.com/rempl-oss/tikz/architecture-components.png!</p>
<p>Presentation Layer includes JSF (Mojarra), JAX-RS (Jersey), and Java EE container (Tomcat). In other words, everything on top of "<a href="http://www.rempl.com/rempl-oss/apidocs/com/rempl/oss/delegates/package-summary.html">Delegates</a>
" in the diagram. Package [com.rempl.oss.delegates|http://www.rempl.com/rempl-oss/apidocs/com/rempl/oss/delegates/package-summary.html]
with its classes realize [Business Delegate|http://java.sun.com/blueprints/corej2eepatterns/Patterns/BusinessDelegate.html]
and [Service Locator|http://java.sun.com/blueprints/corej2eepatterns/Patterns/ServiceLocator.html]
Java EE design patterns. <em>More about it later...</em></p>
<p>Business Layer includes EJB (OpenEJB), <a href="http://www.rempl.com/rempl-oss/apidocs/com/rempl/oss/brokers/package-summary.html">Brokers</a>
(Stateless Session Beans), and JPA entities.</p>
<p>Persistence Layer includes JPA (OpenJPA), JDBC (MySQL JDBC Driver) and the
MySQL server.</p>
<p><a name="EJB+JPA+JSF+JAX-RS-BuildAutomationandTests"></a></p>
<h1>Build Automation and Tests</h1>
<p>Build automation is managed by <a href="http://maven.apache.org/ref/3.0/">Maven 3</a>
, see our [pom.xml|http://trac.fazend.com/rempl/browser/rempl/trunk/rempl/rempl-oss/pom.xml]
.</p>
<p>There are four levels of testing in the product:</p>
<ol>
<li>Static analysis</li>
<li>Out-of-container unit testing</li>
<li>In-container functional testing</li>
<li>On-location testing</li>
</ol>
<p>During static analysis we are using <a href="http://maven.apache.org/plugins/maven-checkstyle-plugin/">Checkstyle</a>
, [PMD|http://maven.apache.org/plugins/maven-pmd-plugin/]
, [FindBugs|http://mojo.codehaus.org/findbugs-maven-plugin/]
, [Cobertura|http://mojo.codehaus.org/cobertura-maven-plugin/]
, [maven-dependency-plugin|http://maven.apache.org/plugins/maven-dependency-plugin/analyze-only-mojo.html]
, [xml-maven-plugin|http://mojo.codehaus.org/xml-maven-plugin/]
. Important to note that all these tools are used as gate condition
checkers, not as post-factum analyzers.&nbsp;</p>
<p>Out-of-container tests are automated with JUnit. Good example of a
Stateless Session Bean out-of-container testing: <a href="http://trac.fazend.com/rempl/browser/rempl/trunk/rempl/rempl-oss/src/test/java/com/rempl/oss/brokers/UserMgrBeanTest.java">UserMgrBeanTest.java</a>
.</p>
<p>In-containter functional testing is automated with JSFUnit and embedded
Tomcat container. <em>more later...</em></p>
<p><em>On-location testing is not yet automated... working on it...</em></p>
<p><a name="EJB+JPA+JSF+JAX-RS-ConfigurationandPlumbing"></a></p>
<h1>Configuration and Plumbing</h1>
<p>TBD...</p>
<p><a name="EJB+JPA+JSF+JAX-RS-Implementation"></a></p>
<h1>Implementation</h1>
<p>TBD...</p>
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